NGC 891 (Galaxy in Andromeda)

(Click here or on image for larger version)

Date: December 2006 (XCM), November 2007 (ST-10)
Location: Elizabeth, CO. ~6500 ft., Mag 5.5 skies
Telescope: 16" f/4.9 Newtonian, Pegasus Optics primary
Mount: Mathis Intsruments MI-500
Exposure: 144 min (2.4 hr) luminance ST-10XME, 90 min RGB ST-2000XCM
Corrector: ST-10 subs at f/9.8 using TeleVue 2x PowerMate. XCM subs at f/4.9 using 3" Keller/Wynne coma corrector. Custom Scientific luminance filter used on each sub
Seeing: ~3.5" FWHM
Comments:

Eighteen ST-10 8 min subs median combined in groups of three in Maxim. Medians summed. Sum processed using Maxim for 10% DDP. CCDStack used on DDP result for 75 iterate PC deconvolution. Above image downsampled to f/4.9 image scale, larger image downsampled to f/7.35

Nine XCM subs, each 10 mins long, calibrated in CCDOps, color converted in Maxim and median combined. Saturation upped 20%, 16-bit TIFF file saved as RGB colorizing image. Luminance and colorizing image registered in Registar, final LRGB assembled in CCDStack.


Return to Steve Bell's home page or go to SEDS page (more photos and info on NGC 891)